Both clubs had reached an agreement over the transfer of the versatile midfielder last week, but an official deal way yet to be finalised until yesterday. The player agreed terms with his new employers on Monday, and he will be able to extend his stay at the Rhein-Energie Stadion at the end of the season, if Cologne decide to use the purchase option present on his contract.

Mokhtari, who was given shirt number ‘36’ by his new club, will be hoping to add to his club’s recent form, Cologne having managed to win both of their first two Bundelsiga rounds (1-0 against Mainz, and an impressive 2-3 win away to Stuttgart).